A calculator which uses the result of a recent race to "generate training paces, race prediction, with adjustments for temperature, body weight and altitude. This calculator works by estimating your V̇O2max and using that to predict your race times and training paces."

It's a shame Jack Daniels requested to have the vdot calculation removed from this calculator in an attempt at commercializing his research to the detriment of the wider running community.

"Earl William 'Madman' Muntz (January 3, 1914 – June 21, 1987) was an American businessman and engineer... He invented the practice that came to be known as Muntzing, which involved simplifying otherwise complicated electronic devices. Muntz produced and marketed the first black-and-white television receivers to sell for less than $100"

Hat tip to a recent EEVblog video for bringing up Muntz and the practice of Muntzing.

This project in progress by Radical Brad looks really neat. It is a graphics co-processor (including an entire 6502-compatible CPU?) for the Commordore VIC-20 made in 7400 logic running at 25Mhz on a solderless breadboard (though I think he plans to create a PCB for it eventually).

Linus Åkesson (lft) converted an old electronic organ into a MIDI controller and 8-bit synthesizer using two 8-bit ATmega88 microcontrollers. The synthesizer sounds very NES-ish with its bright square+triangle+noise oscillators. lft is musician and has several videos of himself on youtube playing very nice renditions of various chiptunes (from memory) on his Chipophone.

"It does help if you can absolutely convince yourself that you're destined for greatness," says Barone. "It's not even an ego thing--it's just a way to prevent doubt and insecurity from hindering you."